Clamp



July 9, 1929.

CLAMP Filed Oct. 22, 1927 Patented July 9, 1929.

UNITED STATES enonen LB. 130800, or CHICAGO, ILLINOIS.

CLAMP.

Application filed October 22, 1927. Serial No. 228,092.

The main objects 031. this invention. are to provide an improved 'lorm0T clamp adapted for use in connection with a flexible tie element; toprovide a clamp having an improved iorm oit collar for receiving aportion of. the tie element; to provide improved means tor detachablysecuring the tie element to the collar; to provide an improved form oftool for adjusting the tie element relative to the collar; and toprovide a device of this kind which is particularly adapted for use as aterm clamp.

An. illustrative embodiment of this inven tion shown in the accompanyingdrawing,

wherein Figure l is a transverse section 01* a girder mold, to which animproved clamp applied.

Fig. 2 is a plan of the improved collar.

Fig. 3 is a side elevation 01 the collar h aving the ends 01? a tieelement seated therein, the latter being shown in section.

Fig. 1 is a longitudinal section taken on the line 4l.t of Fig. 2, andshowing also a wedge in section and a portion of the tie element inelevation.

Fig. 5 is a transverse section, taken on the line 5 5 01? Fig. 2, andshowing also the tie element in section and a portion ot the wedge inelevation.

Fig. 6 is a perspective of the improved collar.

In the specific form herein shown, the invention is applied to a formclamp comprising a tie element and a holding member in the form of acollar secured to the tie element tor adjustment longitudinally thereof.Adjustment oi? the holding member on the tie element is accomplished bymeans of a separate tool adapted to grip the tie element at a pointbeyond the collar for pulling the former relative to the latter.Improved means are also provided for detachably securing the tie elementand collar together.

In the specific emhodin'ient herein illustrated, the improved clamp isapplied to a girder mold suitable for use in concrete construction workand comprising the usual sections 1, battens 2 and spacer blocks 3 sus-.

pended from an I-beam 1; by the tie band.

I In the form shown, the improved term of clamp comprises a tie element5, a collar 6 and a tool 7 which is detachable so that one or two ofsuch tools may serve a large number of clamps.

The tie element 5 is preferably in the form 01' a flexible metal band,the size of which is dependent upon the character of the mold to whichthe clamp is applied.

In the embodiment shown, the collar (5 co1nprises a block having asubstantially i'lat hearing surface 8 on one side thereof. which isadapted to bear against the I-heam 4. Formed on the opposite side of theblock, is a seat 9, which is adapted to receive the tie element 5. Theseat 9 has an unobstructed mouth 10, so as to permit any portion of thetie band to be placed on the seat, without the neijcessity of pullingthe ends of the band tl'irough the collar as has been done heretofore.In the term shown, the seat 9 is sut- Iiciently wide to support two tiebands arranged side by side or two portions of a single band similarlyarrangechas shown in Figs. 3 and 5.

Located. on respectively opposite sides oi? the seat 9, is a pair ofupstanding lugs 11 and 12, which are slotted to provide keyways 13 and 11 respectively. Formed in the seat 9, is a transverse recess 15, intowhich the tie band is Cl'ilTlPOtl by the action of a wedge 16, which isadapted to be driven into the keyways 12-3 and 14;.

In the .lorm shown, the tool 7 comprises a shank 17 providing a handlehaving a jaw 18 provided with a pivot pin 19 on which is mounted amovable jaw 20. The jaw 20 (-onipr es a pair of spaced fingers 21.connected together by a pin 22 which is adapted to coact with the jaw 18for gripping the tie band. The lingers 21 are recessed adjacent theirtree ends to provide bearing parts 23, which are adapted to be tulcrumedon the I-beam 1 as shown in Fig. 1. The bearing parts 23 project beyondthe pin 22 so as to deline a threat adapted to receive a portion. 01.the tie band.

In operation, the tie band. 5 is passed through apertures in the section1 and batten 2 and is then, looped around the I-beam 4;. One oil? theinnn'oved collars 6 is then placed on top oi the Lbeam andv the on dportions of the tie hand are inserted in the seat 9 in the manner shownin Figs. 1 and 3. tools 7 are then applied. to the ends 01 the tie bandand the handles 17 are rocked out\ 'ardly away from each. other to pullthe ends of the band outwardly away from the collar. While the tie bandis held taut by means 01? the two tools 7, the wedge 16 is driven intothe keyways and 141. for locking the tie band and collar together. Thetools 7 may then be removed for use on other parts 01. the mold.

Two 01. the

Wardly from the opposite face of said plate and arranged to form a seatfor a tie element, the space between said ridges formin g a key- Way fora Wedge, and a pair of spaced lugs located'on respectively opposite endsof said ridges and having openings arranged in prolongation of saidlieyway.

Signed at Chicago this 20th day 01 October 1927.

GEORGE B. BOSCO'.

